JM54ACT138B2A

Overview

The JM54ACT138B2A is a high-speed CMOS logic device manufactured by National Semiconductor, functioning as a 1-of-8 decoder or demultiplexer. It translates three binary address inputs into one of eight active-low outputs. The component features latch-compatible controls and is designed for low power consumption and high noise immunity typical of AC series logic. It operates within standard voltage ranges suitable for general digital logic applications.

Feature Summary

• Provides decoding or demultiplexing functionality from three address lines to eight distinct outputs
• Features active-low output states for direct interfacing with various logic families
• Incorporates latch-compatible control inputs to manage data flow timing

Applications

• Address decoding in memory systems
• Demultiplexing data streams in digital communication circuits
• Control signal distribution in embedded hardware

Procurement Notes

Verify the manufacturer designation matches National Semiconductor specifications. Confirm the suffix B2A corresponds to the required package type and temperature rating. Ensure the component is sourced from authorized distributors to guarantee authenticity and compliance with original datasheet parameters.

Selection Notes

Select this component when a reliable 3-to-8 decoding solution is required for AC-series logic environments. Consider its pin compatibility with other 54ACT family members if system expansion is planned. Evaluate power supply requirements against the specific operational voltage range defined in the official documentation.

Part Context

This part belongs to the 54ACT series of high-speed CMOS logic devices produced by National Semiconductor, now part of Texas Instruments. The series is characterized by performance levels compatible with TTL logic while offering improved power efficiency. The 138 variant specifically addresses common decoding needs in complex digital architectures.

Replacement Considerations

Direct substitutes include other 54ACT138 variants from National Semiconductor or Texas Instruments. Verify pinout compatibility and electrical characteristics before substitution. Cross-reference with equivalent parts from other manufacturers only if functional equivalence is confirmed through official datasheets.